Means for heating an annealing leer and process of annealing



T HR. /06.

Ma LNE Y:

Aug 24 y G. J. mm:

WATING AN ANNEALTNG LEER AND PROCESS OF ANNEALING MEANS FOR 1924 2Sheets-Sheet 1 Filed Nov.

Aug. 24 1926. 1,597,481

G. J. RICE MEANS 1 0R HEATING AN ANNEAI-JNG LEER AND PROCESS orANNEALING INVENTUR- AIT RNEY Pate ted-Aug 24', 1926,

TE TA S, PATENT OFFICE.

GUY. J. nice, or cmnnnsron, sHEE'r'GL'Ass coMrANY,

WEST VIRGINIA, ASSIGNOR TO THE LIBQEY-OWENS OE TOLEDO, OHIO, ACORPORATION OF OHIO MEANS non, HEATING An ANNEALING Lean AND rnocnss oranirrannaer.

Application file'd l November 3, 1924. Serial No. 747,583.

Thdpreseht invention "relates to sheet glass drawingiapparatus, and hasparticular reference toj an annealing leer and means for heating:thean'nealing leer.

' T important object of. thisinve'n'tion is to provide an annealingleer-for use in con- 'ncction' with sheet glass apparatus wherein ttheheat used for the annealing process will be accurately controlled and ofsuch a nature asnotjto spoil the sheet being annealed.

A further tion with, "sheet; glass apparatus wherein heat ,absorbed,'from the exhaust gases of b the heatin ineans-used' for sheet glass 1Although this particular type of machineapparatus In amaimerthatairfispassed in proximity to the said 'heat absorbi'n' means after whichtheheated airfi s continuously introduced within the annealing leer forthe purposes'of annealing the'sheet beingpassed therethrough;7;: 1;, f a

A still further object of the invention is to provide aconstruction theflame is: applied the exhaust gases from-one sidebeing passed through3.1., heat-absorhing means th'rou h the opposite side,an d upon reversalof, t e operation-cold air'is passed in proximity to thesaidheat-absorbing means in amanner to suflicientlyheat'it for sheetglass, annealmgpurposes;

vention wi become p arentjjduring ,the course ofthelfollowin (fe'scrition.

In the drawings w erein are; employed; to ""desighate throughout thesanez Fig. 1 is a top plan" drawing p'p ramsg ig. 2 isa s delegationthereofi, v i Figxs is a htai'y vertical, long1tuike numerals like parts,Fig. 4 s

;Fi 5 s siriintgv wtora da a ,used in connection with'ithefl r Inthediawings whey; for the pllltpOses of'illustrationis show th bodiment'pff'the' jinven designates a ftaiik furiiime: which the, raw

glass is intro uced and' in which it is melted.

obj'ectQof-the'lmyention is to provideananneahng leer for use n connec fheat absorbed bodied in an ;of this, nature}. paratu'st 1 whichi'may beadapted for use on the so} i called regenerative type .of furnace,,whereinto the glasslwithin the tank, firstionsone 'sideand theh on'theother, Th

checker-work 14, the said gases, after which the exh The ingredients arepassed into the furnace through the dog-h0use 11. The ingredients arethen melted and passed to the forward end of the tank through a refiningportion, after which they pass through a so-called cooling chamber andinto the draw-pot. The sheet proper is drawn from the draw-pot and is,in the type of ur Patent 1,248,809, granted December 4, 91 i l is herediscussed the invention is notv necessarily thus limited, as the 'leerused on an type of glass a paratus can be'heate'd from mm the heatingmeans used. In other words, the same idea can'be emtype of glassproducing ap- In Fig. 1, is clearly shown one form of heating. means forthe furnace 10, and as can v seen is of the regenerative t pe. ere are abank' of burners 12 on 0th sides of the-furnace and ends the gas nozzles13. Arranged below then embers 12 and preferably below the floor line 1sa so-called checker-work 14, through which the exhaust gases ,side ofthe furnace exit and through which v I t q the intake air on the burnersin use, pass to" Other objectsand advantages of .the inb ers on one sideof the tank are in use-while have at their inner from the opposite theburners on the opposite side are not. Q i

\The flames shoot across the tank heating-the I glass, and exit throughthe x as is clearly shown by the arrows in Fig. 1"$ passi'through thechecker-work ab- The exhaust gases then sorbing most of the heat fromthe exhaust aust connects with the smoke-stack 15.

side of the machine and is heated, after which it is passed through the.members12, as willreadilybe understood.

An object of this invention is to utilize a portion of this absorbedheat for the purpose of heating the Upon reversal of the operation theair used by the furnace is in-' --troduced throughthe ventilator 16,passes through the checker-work 14 on the annealing leer 17 opposite 7through which the sheet- 18 passes. In

order to facilitate the use of this heat the ordinary burners usedinannealing leers supported upon suitable leer rolls 20 whichchecker-work- 14, throng and'due tothe position of the flap valve.

, section's which are normally are usually'supported by rotatableshaftsjournaledm the side of the leer. The plates 19 may be formed ofany suitable structure, and are apertured as at-21. The apertures aremore closely bunched at the forward end of the machine, and gradually saced farther and farther apart so that t e-heatin action willbe less atthe cutting table en 22 of the leer than at the end nearest thedraw-pot. p

Aconduit23 is connected to the checkerwork compartment 14, and isprovided with a flap valve 24, so that either side of the conduit 23'may be cut oi'f as desired. At the entrance of the leer a plurality ofbafiies 25 are provided to maintain an even tem era ture of air .passinwithin the leer. is

7 clearly shown in Fig. 1, the air is introduced through the ventilator16, asses through the the heated'air passes through the leer andexhausts through the stack Upon reversal of the regenerators, the airW111 have sufiicient force to change the position of the flap yalve24 tothe oppositeside so that therewill'bea continuous passage of heated airthrough the annealing leer. A butterfly valve is also provided in'theopposite end 0 the machinefor controlling t e passage of the incomingandjoutgoing air. The but terfly valve 27 is adapted to regulate whichside of the furnace the incoming air through the ventilatorlti willpass.

To prevent an excessive escape of .air g from within the leer a suitableguard 28 18 provided and comprises a. air of hinged lationshipby meansof spring 29, carried by theears 30. The sections 28 may be separatedand slipped over the shaft 31, supporting'fthe leer rolls 2G, anduponrelease of these sections, the spring 29 will bring them intocontact a sin" to prevent the esup trheat from t e' leer; the foregoingit will be absorbed from the exhaust gases of the ret e annealingprocesswill be better taken care (if-[due to the control over the heatingaction by" the plates 19.

It is tobe understood'that the form offthef invention herewith shown anddescribed is d arrangement of parts may be heated air in the leer.

the conduit 23,

eld in close reseen that the, leer is heated by'means of utilization ofheat;

nerators'. In addition to a saving in fuel,

ously introducing eat 9 "new d p r g e: the

spirit of the invention or the scope of tin and means to p s the thustreated air,

throulgh the Jannealin leer. J

2. n sheet glass tank furnace, means for drawing a sheet, an anneahngleer, and means for heating the annealing leer comprising means forabrawing apparatus, a

sorbing heat from the exhaust gases from i the tank furnace, meanstopass a r in proximity'to said heat absorbing means to heat the same,means to pass the thus treated air through the anneal ng leer, and meansfor controlling the heating action of the said' .3. In sheet glass.drawing-apparatus, a

and the said leer for the passage of hot-air,

atothe inlet 'to-the leer for means arran e intake therein, and-means incontrolling the leer for controlling the heating action of" I the air. i

4. In sheet drawing apparatusga tank furnace, means for drawing a'sheetof glass, an annealing leer therefor, means for, 3 continuouslyintroducing heatedair withinthe leer, and means for controlling thelaction thereof in the glass being annealed.

5. In sheet glass drawing apparatus, a

tank'furnace, means for drawing a sheet of I lass, an :annealingleer-means associated with thetank furnacefor absorbing hat,

means for passing-air in 'proximitytherew to heat the same, means .forcontinuously.

assing the thustreated air; through the eer, and means for. controllingthezaction.

of the heated upon the glass being an.

vIll

nealed. [6. In sheet glass drawing dpparatus, a

tank furnace, means fordraw' a sheet. of 1 glass, an annealin leer,means oroontinuously introducing sated air within-the leer,

vand an apertured meihber in, the leer for controllin the annealing ofthe glass.

7. In s eet glass drawing apparatus, -a-

tank furnace, m'eans for drawin a sheet 01- I leezfi means or.continu-'vglass, an annealin air within theleer, and an apertured member arrangedon either side of the glass bei annealed to control the annealing thereo8. In sheetglass drawingapparatus, I

tank furnace, means for drawing aghast of glass, an annealing foflabporh15 consisting 111 absorbing hea' introducing the thus heated air withinthe leer-sand an apertured member for control hug the action of. theheated, air on the glass bein' annealed.

9. In sheet glass drawing apparatus, a tank furnace," means for drawinga sheet of glass, an annealing leer,

utilizing heat from the tank furnace for indirectlyheg 'ting the glassnezlign Ithe same. l t 1 W e recess 0 annea Us e ass, P t Eroi if thexhaust gases; from the heating means used in the sheet glass apparatus,passing air in proximity-tn 20, with sheet glassi to anneal the same. g11. The pro ss yofannealing sheet glass, consisting, 1n absorbing heatfrom a portion of the heating proximity to the sorbin'g means to heatthe same, and then I passing the thus heated air in proximity tothesheet glass, a greater amount of heated air. bein pla'ed on one endofthan at the ot er to heat the same. 30 12. Th

proximity and means for in'the leer for anof; glass therein, means forthe heat absorbing means, andthen bringing the thusheated air in contactmeans used in the sheet glass apparatus, passing an in a consistingin'passing heated air in proximity to the sheet of glass, inprogressively decreasing the amount from one end of: the sheet towardthe other.

annealing lever for use in sheet;

glass drawing-apparatus comprising a tunnel-like struct re, means tosupport a sheet of glass therein, means to supply heated air tothetunnel-like structure, and means to control the actionvof the airupon the sheet of glass being annealed.

, annealing leerfor usein sheet glass drawing apparatus comprising atunnel-like structure, means to support a sheet supplying heated air tothe tunnel-like structure, and an apertu'red plate for controlling theannealing of the 'said sheet-of glass.

15. n annealing leerfor use in 'sheet glass drawing apparatus comprisinga tun nel-like structure, means to support a sheet of glass therein,means to heat the interior of the tunnel-like structure, and an-apentured plate for progressively decreasing the heating ofthe sheet fromone end toward the other.

Signed at Charleston in the county of the sheet Kanawha, and State ofWest Virginia, this th day of October, 1924. e e process ofannealingsheet. glass, 1 a.

GUY J. RICE.

